Volume 26, Issue 17, Pages R779-R782 (September 2016) A global megadam mania  Michael Gross  Current Biology  Volume 26, Issue 17, Pages R779-R782 (September 2016) DOI: 10.1016/j.cub.2016.08.050 Copyright © 2016 Terms and Conditions

Water warriors: As Brazil has already dammed and utilised its more accessible rivers, new hydroelectricity projects are planned in remote areas including the Amazon rainforests, where they endanger both ecological treasures and the livelihoods of indigenous groups. The photo shows members of the Munduruku tribe, who have recently won a rare success in blocking the first of many reservoirs planned for the Tapajós river, a major contributory of the Amazon. (Photo: Amazon Watch amazonwatch.org) Current Biology 2016 26, R779-R782DOI: (10.1016/j.cub.2016.08.050) Copyright © 2016 Terms and Conditions

Building big: The Hoover dam on the Colorado river in the USA may soon be dwarfed by new hydroelectric projects in the developing world, following the lead of China’s Three Gorges dam. (Photo: Wikimedia Commons.) Current Biology 2016 26, R779-R782DOI: (10.1016/j.cub.2016.08.050) Copyright © 2016 Terms and Conditions

Dried up: Dams can dramatically change water distribution, providing irrigation to some areas, while depriving other areas of water. Several major rivers around the world have been literally run dry due to human interventions. The photo shows a woman crossing a dry reservoir in the Hubei province of China. (Photo: flickr/toehk.) Current Biology 2016 26, R779-R782DOI: (10.1016/j.cub.2016.08.050) Copyright © 2016 Terms and Conditions

Changing landscapes: The controversial site C project in British Columbia, Canada, is already having a dramatic impact on the local environment. Current Biology 2016 26, R779-R782DOI: (10.1016/j.cub.2016.08.050) Copyright © 2016 Terms and Conditions